Jacket-stretcher



No. 624,60l. Patented my 9, I399. A. 0. WYMAN.

JACKET STBETOHEB.

(Application filed Aug. 18, 1898.)

(No Model.)

jz/waw By Arrow/E m EV Q WITNESSES Jfl M,

' THE-NORRIS Pzrzns w, PHOTO-LITHQ, WASHINGTON. 0.1:.

NITED STATES PATENT OFFICE.

ALBERT OREN wYMAn, or TURNERS FALLS, MASSACHUSETTS.

' JACKET-STRETCHER.

SPECIFICATION forming part of Letters Patent No. 624,601, dated May 9, 189 9.

Application filed August 18, 1898. Serial. No. 688,869. (No model) To all whom it may concern:

Be it known that I, ALBERT OREN WYMAN, a citizen of the United States, residing at Turners Falls, in the county of Franklin and State of Massachusetts, have invented certain new and useful Improvements in J acket- Stretchers, of which the following is a full and complete specification, such as will enable those skilled in the art to which it appertains to make and use the same. i

Thisinvention relatesto devices forstretching jackets used in paper-machines and for similar purposes 5 and the object thereof is to provide an adjustable stretcher of this class which is adapted for use to stretch the jackets employed in connection with rolls of different diameters; and with this and other objects in view the invention consists in the construction, combination, and arrangement of parts hereinafter described and claimed.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which the separate parts of myimprovement are desig nated by the same numerals of reference in each of the views, and in which Figure 1 is a side elevation of my improved stretcher; Fig. 2, a cross-section on the line 2 2, and Fig. 3 is a cross-section of Fig. 1 on the line 3 3 thereof.

In the practice of my invention I provide two horizontal side bars 5, which are preferably of the form shown in Fig. 1, being circular in cross-section on their outer sides, as shown at 6 in Fig. 2, and beveled at their outer corners, as shown at 7 in Fig. 1. Bigidly secured to the inner sides of the sidebars 5 at regular intervals are triangular blocks 8, four or more of which are employed, according to the length of jacket to be stretched, and these blocks are ofthe form of a rightangle triangle, and the longer sides thereof aretdirected inwardly, and said blocks are wedge-shaped in form, and the opposite blocks on each bar are connected by a cross-head 9, said cross-head 9 being slidably connected with the triangular blocks 8 by a dovetail tongue-and groove joint 10. Each of the crossheads 9 is provided centrally with a screwthreaded tubular bearing 10 and passing centrally through all of said tubular bearings is a shaft 11, the ends of which are provided with threads 12, and the threading at one end is the reverse of that at the other end.

It will be seen that the blocks 8 are arranged in pairs at the opposite ends of the device, two pairs or more being employed ateach end, and all of said blocks point toward the center of the stretchen I also employ at each end of the device guide-arms 13, which are mounted on the shaft 11, said guide-arms being each provided with a central tubular bearing 14,

through which the shaft 11 passes, and these arms are provided with inwardly-directed end extensions, which movein grooves 15 in the outer ends of the end blocks 8 and serve to keep the side bars parallel and in proper relative position, and the ends of the blocks 8 may, if desired, be provided with scales 15, by means of which the exact width of the stretcher may be shown, the guide-arms 13 operating as pointers in connection therewith, as shown in Fig. 3. The ends of the shaft 11 are also provided with cross-heads 16, by which said shaft is operated, and the operation will be readily understood from the foregoing description when taken in connection with the accompanying drawings and the following statement thereof.

By turning the shaft 11in one direction the bars 5 are forced apart, and by turning the said shaft in the opposite direction said bars 5 are drawn together, and the width of the stretcher may thus .be enlarged or diminished, asdesired. In practice the shaft 11 is turned so as to draw the side bars vapproximately near together, and the stretcher is'then passed through the jacket to be stretched, after which the said shaft is turned in the opposite direction and the side bars forced apart to the farthest extent desired, and the jacket is thusquickly and easily stretched and may be held in the stretched condition as long as desired.

The stretcher may be of any desired length, and it will be apparent that changes in and modification'sof the construction herein de= scribed may be made without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, I claim as new and desire to secure by Letters Patent a ger-n IOO - 1. A jacket-stretcher, consisting of two parallel side bars, triangular blocks arranged in pairs and connected with the inner sides of said bars, at the opposite ends thereof, the vertices of said blocks pointing toward the central portion of said stretcher, a cross-head slidably connected with the blocks of each pair, said cross-heads being each provided with a tubular central bearing, and a shaft which passes centrally through said bearings of each of the cross-heads, said shaft being provided at its ends with oppositely-arranged screw-threads, and said bearings being correspondingl'y screw-threaded, substantially as shown and described.

2. A jacket-stretcher, consisting of two parallel side bars, triangular blocks arranged in pairs and connected with the inner sides of said bars at the opposite ends thereof, the vertices of said blocks pointing toward the central portion of said stretcher, a cross-head slidably connected with the blocks of each pair by means of a dovetail tongue-and-groove joint, said cross-heads being provided with a tubular central bearin g and a shaft which passes centrally through said bearin gs of each of the cross-heads, said shaft being provided at its ends with oppositely-arranged screwthreads, and said bearings being correspondingly screw-threaded, substantially as shown and described.

3. A jacket-stretcher, consisting of two parallel side bars, triangular blocks arranged in pairs and connected with the inner sides of said bars at the opposite ends thereof, the vertices of said blocks pointing toward the central portion of said stretcher, a cross-head slidably connected with the blocks of each pair, said cross-heads being each provided with a tubular central bearing and a shaft which passes centrally through said bearings of each of the cross-heads, said shaft being provided at its ends with oppositely-arranged screw-threads, and said bearings being correspondingly screw-threaded, arms mounted on said shaft at each end thereof, and in which said shaft is free to turn, the ends of said arms being adapted to enter grooves in the outer ends of the end blocks, substantially as of each of the cross-heads, said shaft beingprovided at its ends with oppositely-arranged screw-threads, and said bearings being correspondingly screw-threaded, and a cross-head mounted on said shaft at each end thereof and by which it is operated, substantially as shown and described.

5. A jacket-stretcher, consisting of two parallel side bars, triangular blocks arranged in pairs and connected with the inner sides of said bars, at the opposite ends thereof, the vertices of said blocks pointing toward the central portion of said stretcher, a cross-head slidably connected with the blocksof each pair, said cross-heads being each provided with a tubular central bearing, a shaft passing centrally through said bearings of each of the cross-heads, said shaft being provided at its ends with oppositely-arranged screwthreads, said bearings being correspondingly screw-threaded, arms mounted on said shaft at the ends thereof, and in which said shaft is free to turn, the ends of said arms being in slidable connection with the outer ends of the end blocks, one of which is provided with a scale in connection with which one end of the adjacent arm is adapted to operate as a pointer,substantially as shown and described.

In testimony that I claim the foregoing as my invent-ion I have signed my name, in presence of the subscribing witnesses, this 8th day of August, 1898.

ALBERT OREN WYMAN.

\Vitnesses':

JAMES A. GUNN,

ARTHUR E. WYMAN. 

